CREATE YOUR PERFUMES How to use a Pasteur pipette
6x
10 x
Pipettes are used in laboratory to add liquids drop by drop. As so, they are measuring instruments. Before beginning the experiment you must practice on how to handle the Pasteur pipette, starting by filling in a cup with water. 1. Squeeze and hold the upper part of the Pasteur pipette. Place the tip of the Pasteur pipette in the liquid.
Peach
Vanilla
2. Release slowly the upper part of the Pasteur pipette. Observe the liquid being pulled into the Pasteur pipette. 3. Remove the tip of the Pasteur pipette from the water and squeeze, slightly, the upper part. The drops will start coming out from the Pasteur pipette. Add the number of drops you wish.
4. In the small measuring cup, measure 5 ml of water.
5 ml
mark Step 1
Step 2
Step 3
Image 36. Advices for the proper use of a Pasteur pipette.
2. Let’s mix 3 fragrances. Make sure you use a different Pasteur pipette for each fragrance. 3. Place the following number of drops into the test tube on the rack:
6x 10 x
22
of Vanilla of Peach
5. With the help of the funnel, add water to the test tube.